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A students received a score of 50 on his history test. The test had a mean of 69 and a standard deviation of 10. Find the z score and assess whether his score is considered unus…

A students received a score of 50 on his history test. The test had a mean of 69 and a standard deviation of 10. Find the z score and assess whether his score is considered unus…
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3 votes
A students received a score of 50 on his history test. The test had a mean of 69 and a standard deviation of 10. Find the z score and assess whether his score is considered unusual.

asked
User Roeland
by
8.3k points

2 Answers

6 votes
i believe its 69.5 or 10 50 69
answered
User Anton Krug
by
7.7k points
4 votes

Answer:

-1.9 unusual

Explanation:

z score is (x-mean)/sd so 50-69=-19

-19/10=-1.9

answered
User Rob Wells
by
8.7k points
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